Citrus greening, a silent killer sweeping through the United States’ groves for decades, is a threat to more than just your morning OJ.

Ten years ago, a mysterious new disease was found sweeping through Hawaii’s native ‘ohi‘a forests, killing off the foundation ...

Nasty root rot threatens the Fraser fir, a beloved Christmas tree. North Carolina scientists are trying to save the iconic species.

A UC Berkeley-led citizen science project has discovered at least four outbreaks of a new, potentially more aggressive form ...

Now, researchers are in a race against time. They say most of the vast ‘ohi‘a forests on Hawaii island will be gone in the ...

Bradford pears have notoriously weak crotches (branch angles). Think of your index and middle fingers forming a “V” for ...

Lonnee says they mature at around 60 to 75 feet tall and 70 to 90 feet wide, making them a "great shade tree" for large lots.

Woody plant growth is fascinating, and each year trees and shrubs produce a visible record of how much they grew. In fall, as woody plants go dormant, we can examine these signs for a glimpse of ...

The fight to protect trees in North Lanarkshire from Ash Dieback disease continues, as highlighted in a recent report. The annual update, which was approved by the council’s environment and ...

While looking at my hackberry tree, the leaves were covered with this small round growth. Is it a disease, insect or just part of the tree? Will it kill my tree? How do I control it? Those small bumps ...

Hackberry trees grow well in the shade ... Another point of uncertainty is infestation and diseases, such as the invasive emerald ash borer, which has killed hundreds of ash trees.

The tree was sown by Mary Ann Brailsford in the garden of her parents' home in Church Street, Southwell, Nottinghamshire, between 1809 and 1815. Almost 50 years later, a 17-year-old boy named ...